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Anas,<br>
There is not a specific Type that contains the features that you
are looking for. However you can create the control that you
describe by using a combination of simple thermostats (either Type2
in its "aquastat" mode or one of the aquastats in the TESS
Controller's library) and equations. You will probably need to use
some of the boolean (logical) functions such as GT(:,:) in your
equations. Explanations of those functions can be found in section
6.3.9 of the 06-TRNEdit manual in the ..\Trnsys17\Documentation\
folder.<br>
kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 07/02/2015 21:25, Anas Majdouli
wrote:<br>
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<div dir="ltr">Hi TRNsys community,<br>
<br>
I am working on a water heating simulation using a PV panel. I
am using for this power from PV panel to supply an electric
heating device within a hot water storage tank (type 534).<br>
The tank also contains an auxiliary heater placed on top (node
2) in case the set point temperature (T° of Node 1) is not
reached.<br>
I would like to put a controller between the PV panel,the tank
and its heating devices.<br>
<b>That's how I would like it to work :</b><br>
<br>
First, I want the PV panel to supply power on daylight. Then
during the night, the controller should activate the auxiliary
heater.<br>
<br>
Also, on daylight, if irradiance is not sufficient to reach the
set point temperature in a tank (T° of Node 1 observed by an
aquastat), the controller should activate the aux. heater.<br>
<br>
Finally, when the irradiance is high or when the set point
temperature is already reached on daylight, I want the
controller to switch PV panel power supply from supplying the
electric heating device to supplying a battery linked to the
grid (Type 188a).<br>
In that case, the aux. heater should obviously be switched off.<br>
<br>
What Type(s) should I use for the controller ?<br>
What do you think of this 'scenario' ?<br>
<br>
Thanks in advance for your reply. I extremely need your help.<br>
<br>
p.s : please find a draft of the worksheet of my simulation
attached to this email<br>
<br>
Best Regards,<br>
Anas MAJDOULI<br>
</div>
<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
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